RSS is a very simple XML format

A feed comprises a channel, which has a title, link, description, and (optional) language, followed by a series of items, each of which have a title, link, and description.

Here is a fictitious COMP1710 RSS feed:

    <rss version="0.91">
        <channel>
            <title>COMP1710 News</title>
            <link>http://cs.anu.edu.au/students/comp1710.com/</link>
            <description>Features COMP1710 news.</description>
            <language>en-us</language>

            <item>
                <title>Last week of Lectures!</title>
                <link>http://escience.anu.edu.au/nm</link>
                <description>The last lecture reviews the course and has exam hints.</description>
            </item>

            <item>
                <title>Lab marks</title>
                <link>http://cs.anu.edu.au/streams</link>
                <description>Please check you lab marks, a blank means nothing was submitted.</description>
            </item>

        </channel>
    </rss>

The RSS 2.0 format is slightly more verbose.

 

Reference: sample RSS channel.